feat: enhance discount handling in financial forms

- Implemented discount and adjustment fields in Bill, Credit Note, Estimate, Invoice, and Receipt forms.
- Created new components for displaying discount and adjustment totals, improving clarity in financial documents.
- Updated utility functions to format discount and adjustment amounts consistently across various forms.
- Enhanced user experience by integrating discount functionality into the form context, allowing for better data management and display.

This update improves the overall functionality and user experience related to discounts in financial transactions.

packages/webapp/src/containers/Purchases/Bills/BillForm/utils.tsx

@@ -66,6 +66,13 @@ export const defaultBill = {
   currency_code: '',
   entries: [...repeatValue(defaultBillEntry, MIN_LINES_NUMBER)],
   attachments: [],
+
+  // Adjustment
+  adjustment: '',
+
+  // Discount
+  discount: '',
+  discount_type: 'amount',
 };
 
 export const ERRORS = {
@@ -364,6 +371,17 @@ export const useBillSubtotal = () => {
   return React.useMemo(() => getEntriesTotal(entries), [entries]);
 };
 
+/**
+ * Retrieves the bill subtotal formatted.
+ * @returns {string}
+ */
+export const useBillSubtotalFormatted = () => {
+  const subtotal = useBillSubtotal();
+  const { currency_code: currencyCode } = useFormikContext();
+
+  return formattedAmount(subtotal, currencyCode);
+};
+
 /**
  * Retrieves the bill discount amount.
  * @returns {number}
@@ -374,6 +392,17 @@ export const useBillDiscountAmount = () => {
   return toSafeNumber(values.discount);
 };
 
+/**
+ * Retrieves the bill discount amount formatted.
+ * @returns {string}
+ */
+export const useBillDiscountAmountFormatted = () => {
+  const discountAmount = useBillDiscountAmount();
+  const { currency_code: currencyCode } = useFormikContext();
+
+  return formattedAmount(discountAmount, currencyCode);
+};
+
 /**
  * Retrieves the bill adjustment amount.
  * @returns {number}
@@ -384,6 +413,17 @@ export const useBillAdjustmentAmount = () => {
   return toSafeNumber(values.adjustment);
 };
 
+/**
+ * Retrieves the bill adjustment amount formatted.
+ * @returns {string}
+ */
+export const useBillAdjustmentAmountFormatted = () => {
+  const adjustmentAmount = useBillAdjustmentAmount();
+  const { currency_code: currencyCode } = useFormikContext();
+
+  return formattedAmount(adjustmentAmount, currencyCode);
+};
+
 /**
  * Retrieves the bill total tax amount.
  * @returns {number}
@@ -426,3 +466,14 @@ export const useBillTotal = () => {
     R.subtract(R.__, adjustmentAmount),
   )(subtotal);
 };
+
+/**
+ * Retrieves the bill total formatted.
+ * @returns {string}
+ */
+export const useBillTotalFormatted = () => {
+  const total = useBillTotal();
+  const { currency_code: currencyCode } = useFormikContext();
+
+  return formattedAmount(total, currencyCode);
+};